I have a bottle of 25mg of Quetiapine that was prescribed near 2 years ago to take as needed. You are right... where is that line between taking it and not needing to do so? I can't find it. I will ask myself, "Is it time? Is it time?" and haven't a clue. I've had some pretty rough goes with anxiety in hindsight but have most times told myself, "Nah, take it when it gets even worse"

This is interesting though because I can count on one hand I think the times I have lost all hope and taken a PRN. But two of those times have occurred in the last week and I doubled the dose each time.